2234 



Journal of Applied Microscopy 



phloem. So long as the xylem cylinder is left the upward flow of water is not 

 disturbed. 



3. The Influence of Light on the Formation of Roots and Shoots. (A) Make a 

 preparation similar to No. 1 (A) and exclude all light. The cuttings will show 

 a tendency towards the suppression of shoots and the production of roots. 



Fig. 10. — Willow cuttings from which a ring of bark has been removed. 



(B) A preparation similar to the foregoing is made, except that light is 

 admitted on one side. Here there is a tendency to produce shoots on the illum- 

 inated side and roots on the opposite side of each cutting. 

 University of Michigan. HOWARD S. Reed. 



Dr. Frederick D. Heald, professor of biology in Parsons College, Iowa, 

 has been elected to the position of adjunct professor of plant physiology and 

 general bacteriology in the University of Nebraska. He will take up the duties 

 of his new position during the summer, having charge of the classes in botany 

 at the summer session. 



